asterisk_selinux(8)

📦
version 20250627+git412.dbf877ab7 · 7 versions
, in opensuse-leap 16.0

💖 asterisk_selinux — bestie edition 💖

okay so this is the asterisk_selinux(8) page from the SELinux Policy asterisk manual, and we're gonna get you comfy with it, no cap.

✨ NAME ✨

asterisk_selinux — Security Enhanced Linux Policy for the asterisk processes 🎀

🌸 DESCRIPTION 🌸

Security-Enhanced Linux secures the asterisk processes via flexible mandatory access control. that's the whole vibe — SELinux is the bouncer, asterisk is the main character, and the policy is the guest list 💅

The asterisk processes execute with the asterisk_t SELinux type. wanna check if you've got these processes running? run the ps command with the -Z qualifier, like this:

ps -eZ | grep asterisk_t

go off, bestie 🔥

🦋 ENTRYPOINTS 🦋

The asterisk_t SELinux type can be entered via the asterisk_exec_t file type.

The default entrypoint paths for the asterisk_t domain are literally these:

/usr/bin/asterisk

one path. iconic, honestly.

👑 PROCESS TYPES 👑

SELinux defines process types (domains) for each process running on the system.

You can see the context of a process using the -Z option to ps.

Policy governs the access confined processes have to files. SELinux asterisk policy is very flexible, allowing users to setup their asterisk processes in as secure a method as possible. 🫶

The following process types are defined for asterisk:

asterisk_t
Note: semanage permissive -a asterisk_t can be used to make the process type asterisk_t permissive. SELinux does not deny access to permissive process types, but the AVC (SELinux denials) messages are still generated. so like, it's not a free pass — the receipts still show up 💀

⭐ BOOLEANS ⭐

SELinux policy is customizable based on least access required. asterisk policy is extremely flexible and has several booleans that allow you to manipulate the policy and run asterisk with the tightest access possible. tightest access = the slay-est access, fr fr.

  • If you want to dontaudit all daemons scheduling requests (setsched, sys_nice), you must turn on the daemons_dontaudit_scheduling boolean. Enabled by default.
setsebool -P daemons_dontaudit_scheduling 1
  • If you want to allow all domains to execute in fips_mode, you must turn on the fips_mode boolean. Enabled by default.
setsebool -P fips_mode 1
  • If you want to allow system to run with NIS, you must turn on the nis_enabled boolean. Disabled by default.
setsebool -P nis_enabled 1

🎀 PORT TYPES 🎀

SELinux defines port types to represent TCP and UDP ports.

You can see the types associated with a port by using the following command:

semanage port -l

Policy governs the access confined processes have to these ports. SELinux asterisk policy is very flexible, allowing users to setup their asterisk processes in as secure a method as possible. ✨

The following port types are defined for asterisk:

asterisk_port_t

Default Defined Ports:

tcp 1720
udp 2427,2727,4569

write those down, iykyk 📝

🍓 MANAGED FILES 🍓

The SELinux process type asterisk_t can manage files labeled with the following file types. The paths listed are the default paths for these file types. Note: the process's UID still needs to have DAC permissions — SELinux isn't out here overriding the basics, bestie.

asterisk_log_t

/var/log/asterisk(/.*)?

asterisk_spool_t

/var/spool/asterisk(/.*)?

asterisk_tmp_t

(no default paths listed, she's mysterious like that 🌈)

asterisk_tmpfs_t

(also no default paths — same energy)

asterisk_var_lib_t

/var/lib/asterisk(/.*)?

asterisk_var_run_t

/run/asterisk.*

cluster_conf_t

/etc/cluster(/.*)?

cluster_var_lib_t

/var/lib/pcsd(/.*)?
/var/lib/cluster(/.*)?
/var/lib/openais(/.*)?
/var/lib/pengine(/.*)?
/var/lib/corosync(/.*)?
/usr/lib/heartbeat(/.*)?
/var/lib/heartbeat(/.*)?
/var/lib/pacemaker(/.*)?

cluster_var_run_t

/run/crm(/.*)?
/run/cman_.*
/run/rsctmp(/.*)?
/run/aisexec.*
/run/heartbeat(/.*)?
/run/pcsd-ruby.socket
/run/corosync-qnetd(/.*)?
/run/corosync-qdevice(/.*)?
/run/pcsd.socket
/run/corosync.pid
/run/cpglockd.pid
/run/rgmanager.pid
/run/cluster/rgmanager.sk

krb5_host_rcache_t

/var/tmp/krb5_0.rcache2
/var/cache/krb5rcache(/.*)?
/var/tmp/nfs_0
/var/tmp/DNS_25
/var/tmp/host_0
/var/tmp/imap_0
/var/tmp/HTTP_23
/var/tmp/HTTP_48
/var/tmp/ldap_55
/var/tmp/ldap_487
/var/tmp/ldapmap1_0

root_t

/sysroot/.aleph-version.json
/sysroot/ostree/deploy/.*-atomic/deploy(/.*)?
/
/initrd
/var/lib/ntp

💜 FILE CONTEXTS 💜

SELinux requires files to have an extended attribute to define the file type.

You can see the context of a file using the -Z option to ls.

Policy governs the access confined processes have to these files. SELinux asterisk policy is very flexible, allowing users to setup their asterisk processes in as secure a method as possible. 💅

🌈 STANDARD FILE CONTEXT 🌈

SELinux defines the file context types for the asterisk. if you wanted to store files with these types in a different paths, you need to execute the semanage command to specify alternate labeling and then use restorecon to put the labels on disk. like so:

semanage fcontext -a -t asterisk_exec_t '/srv/asterisk/content(/.*)?'
restorecon -R -v /srv/myasterisk_content
Note: SELinux often uses regular expressions to specify labels that match multiple files. regex girlies stay winning 🧚

The following file types are defined for asterisk:

  • asterisk_etc_t — Set files with the asterisk_etc_t type, if you want to store asterisk files in the /etc directories.
  • asterisk_exec_t — Set files with the asterisk_exec_t type, if you want to transition an executable to the asterisk_t domain.
  • asterisk_initrc_exec_t — Set files with the asterisk_initrc_exec_t type, if you want to transition an executable to the asterisk_initrc_t domain.
  • asterisk_log_t — Set files with the asterisk_log_t type, if you want to treat the data as asterisk log data, usually stored under the /var/log directory.
  • asterisk_spool_t — Set files with the asterisk_spool_t type, if you want to store the asterisk files under the /var/spool directory.
  • asterisk_tmp_t — Set files with the asterisk_tmp_t type, if you want to store asterisk temporary files in the /tmp directories.
  • asterisk_tmpfs_t — Set files with the asterisk_tmpfs_t type, if you want to store asterisk files on a tmpfs file system.
  • asterisk_var_lib_t — Set files with the asterisk_var_lib_t type, if you want to store the asterisk files under the /var/lib directory.
  • asterisk_var_run_t — Set files with the asterisk_var_run_t type, if you want to store the asterisk files under the /run or /var/run directory.
Note: File context can be temporarily modified with the chcon command. If you want to permanently change the file context you need to use the semanage fcontext command. This will modify the SELinux labeling database. You will need to use restorecon to apply the labels. ok so chcon is the temporary tattoo and semanage fcontext + restorecon is the real one, got it 😭

🔥 COMMANDS 🔥

  • semanage fcontext can also be used to manipulate default file context mappings.
  • semanage permissive can also be used to manipulate whether or not a process type is permissive.
  • semanage module can also be used to enable/disable/install/remove policy modules.
  • semanage port can also be used to manipulate the port definitions
  • semanage boolean can also be used to manipulate the booleans
  • system-config-selinux is a GUI tool available to customize SELinux policy settings.

🫶 AUTHOR 🫶

This manual page was auto-generated using sepolicy manpage. (yes, a robot wrote it. and now a gen z rewrote the robot's homework. we love a chain of custody 💀)

💖 SEE ALSO 💖

selinux(8), asterisk(8), semanage(8), restorecon(8), chcon(1), sepolicy(8), setsebool(8)

and that's the whole page, bestie!! asterisk · 26-10-06 · asterisk_selinux(8) — go forth and label responsibly, mwah 💋✨

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